# GPT-5.1-Codex vs OLMo 2 Furious 13B

> GPT-5.1-Codex is the stronger model overall, scoring 38.6 to 29.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-1-codex-vs-olmo-2-furious-13b
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.1-Codex leads 41.9 to 28.6.
- OLMo 2 Furious 13B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 38.6 | 29.7 |
| Rank | 186 | 304 |
| Context | 400K | — |
| Input $/M | $1.25 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.1-Codex: 41.9 (#116)
- OLMo 2 Furious 13B: 28.6 (#313)

| Benchmark | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LiveBench Coding | — | 10.4% |
| ALE-Bench | 1,245 | — |

## Agentic & Tool Use

- GPT-5.1-Codex: 38.0 (#33)
- OLMo 2 Furious 13B: —

| Benchmark | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |

## Reasoning

- GPT-5.1-Codex: —
- OLMo 2 Furious 13B: 15.5 (#314)

| Benchmark | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| LiveBench Reasoning | — | 16.3% |
| LiveBench Data Analysis | — | 20.6% |
| LiveBench | — | 22.1% |

## Math

- GPT-5.1-Codex: 30.3 (#235)
- OLMo 2 Furious 13B: 23.1 (#273)

| Benchmark | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| ProofBench | 9% | — |
| Omni-MATH | — | 15.6% |
| LiveBench Math | — | 13.6% |

## Knowledge

- GPT-5.1-Codex: —
- OLMo 2 Furious 13B: 18.3 (#283)

| Benchmark | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| MMLU-Pro | — | 31% |
| GPQA (HELM) | — | 31.6% |

## Instruction Following

- GPT-5.1-Codex: —
- OLMo 2 Furious 13B: 60.9 (#248)

| Benchmark | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| LiveBench Instruction Following | — | 60.6% |
| IFEval | — | 73% |

## Writing & Preference

- GPT-5.1-Codex: —
- OLMo 2 Furious 13B: 42.9 (#230)

| Benchmark | GPT-5.1-Codex | OLMo 2 Furious 13B |
|---|---|---|
| WildBench | — | 68.9% |
| LiveBench Language | — | 11.2% |

## FAQ

### Is GPT-5.1-Codex better than OLMo 2 Furious 13B?

GPT-5.1-Codex is the stronger model overall, scoring 38.6 to 29.7 on the Noometry Index.

### Is GPT-5.1-Codex or OLMo 2 Furious 13B better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.9 versus 28.6 in the Noometry coding category.

### How many benchmarks do GPT-5.1-Codex and OLMo 2 Furious 13B share?

0 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and OLMo 2 Furious 13B has 12.